TY - JOUR A1 - Chisham, G. A1 - Yeoman, T. K. A1 - Sofko, G. J. T1 - Mapping ionospheric backscatter measured by the SuperDARN HF radars – Part 1: A new empirical virtual height model JO - Ann. Geophys. J1 - ANGEO VL - 26 IS - 4 SP - 823 EP - 841 Y1 - 2008/05/13 PB - Copernicus Publications SN - 1432-0576 UR - https://angeo.copernicus.org/articles/26/823/2008/ L1 - https://angeo.copernicus.org/articles/26/823/2008/angeo-26-823-2008.pdf DO - 10.5194/angeo-26-823-2008 ER -